The optimization of methods of synthesis of nickel–silver core–shell nanoparticles for conductive materials
| Autor: | Magdalena Parlinska-Wojtan, Robert P. Socha, Dorota Gawel, Piotr Warszyński, Krzysztof Szczepanowicz, Elżbieta Drzymała, Anna Pajor-Świerzy |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Reducing agent Mechanical Engineering Metal ions in aqueous solution Nanoparticle Bioengineering 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Ion Transmetalation Nickel silver Chemical engineering Mechanics of Materials visual_art Galvanic cell visual_art.visual_art_medium General Materials Science Electrical and Electronic Engineering 0210 nano-technology Dispersion (chemistry) |
| Zdroj: | Nanotechnology. 30:015601 |
| ISSN: | 1361-6528 0957-4484 |
| DOI: | 10.1088/1361-6528/aae677 |
| Popis: | Nickel-silver core-shell (Ni@Ag) nanoparticles (NPs) were formed in a two-step process: (1) the formation of a dispersion of Ni NPs; and (2) the transmetalation (galvanic displacement) reaction, where the surface of the Ni NPs acted as the reducing agent of Ag ions. Ni NPs were synthesized by the 'wet' chemical method, i.e., by the reduction of metal ions by using NaBH4 as the reducing agent. The influence of the concentration of polymeric stabilizer, reducing agent and Ag precursor on the properties of synthesized NPs was evaluated. In the optimal condition of synthesis, Ni@Ag NPs with about 50 and 210 nm-diameter Ni core coated with a thin (∼10-20 nm) Ag shell, were obtained. Finally, the stability of the synthesized spherical-shaped Ni@Ag NPs was tested and the results indicate long-term stability against aggregation and Ni oxidation. Thus, the resulting NPs are promising candidates for application in electronic devices, e.g., as components of conductive inks or pastes. |
| Databáze: | OpenAIRE |
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